Inconsiderate fellow passangers.
All it takes is one inconsiderate entitled jerk to ruin a plane ride. Imagine getting on a plane and being fortunate enough that there are no babies there.
You're trying to fall asleep but the person behind you decides a plane is the perfect place to do breathing exercises loud enough that literally the whole flight can hear you. You look back to see them and they continue revving the engine like dude hello there are other people here. Unbelievable.
Before any of you come at me with 'it could be medical you're the entitled one', I seriously don't think it was. Where I come from, old people have a habit of doing this randomly.